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    CVE-2025-20144

    A vulnerability in the hybrid access control list (ACL) processing of IPv4 packets in Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incorrect handling of packets when a specific configuration of the hybrid ACL exists. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass a configured ACL on the affected device. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.

    Published:Mar 12, 2025
    Last Modified:Aug 4, 2025
    EPS:Mar 12, 2025
    EPSS Score:0.00037
    CVSS Score:4

    Affected Products

    Vendor
    Cisco
    Product
    Ios Xr
    Vendor
    Cisco
    Product
    Ios Xr Software
    Vendor
    Cisco
    Product
    Ncs 540-12z20g-sys-a
    Vendor
    Cisco
    Product
    Ncs 540-12z20g-sys-d
    Vendor
    Cisco
    Product
    Ncs 540-24q2c2dd-sys
    Vendor
    Cisco
    Product
    Ncs 540-24q8l2dd-sys
    Vendor
    Cisco
    Product
    Ncs 540-24z8q2c-sys
    Vendor
    Cisco
    Product
    Ncs 540-28z4c-sys-a
    Vendor
    Cisco
    Product
    Ncs 540-28z4c-sys-d
    Vendor
    Cisco
    Product
    Ncs 540-6z14s-sys-d
    Vendor
    Cisco
    Product
    Ncs 540-6z18g-sys-a
    Vendor
    Cisco
    Product
    Ncs 540-6z18g-sys-d
    Vendor
    Cisco
    Product
    Ncs 540-acc-sys
    Vendor
    Cisco
    Product
    Ncs 540-fh-agg
    Vendor
    Cisco
    Product
    Ncs 540-fh-csr-sys
    Vendor
    Cisco
    Product
    Ncs 540x-12z16g-sys-a
    Vendor
    Cisco
    Product
    Ncs 540x-12z16g-sys-d
    Vendor
    Cisco
    Product
    Ncs 540x-16z4g8q2c-a
    Vendor
    Cisco
    Product
    Ncs 540x-16z4g8q2c-d
    Vendor
    Cisco
    Product
    Ncs 540x-16z8q2c-d
    Vendor
    Cisco
    Product
    Ncs 540x-4z14g2q-a
    Vendor
    Cisco
    Product
    Ncs 540x-4z14g2q-d
    Vendor
    Cisco
    Product
    Ncs 540x-6z18g-sys-a
    Vendor
    Cisco
    Product
    Ncs 540x-6z18g-sys-d
    Vendor
    Cisco
    Product
    Ncs 540x-8z16g-sys-a
    Vendor
    Cisco
    Product
    Ncs 540x-8z16g-sys-d
    Vendor
    Cisco
    Product
    Ncs 540x-acc-sys
    Vendor
    Cisco
    Product
    Ncs 5501
    Vendor
    Cisco
    Product
    Ncs 5501-se
    Vendor
    Cisco
    Product
    Ncs 5502
    Vendor
    Cisco
    Product
    Ncs 5502-se
    Vendor
    Cisco
    Product
    Ncs 5508
    Vendor
    Cisco
    Product
    Ncs 5516
    Vendor
    Cisco
    Product
    Ncs 560-4
    Vendor
    Cisco
    Product
    Ncs 560-7
    Vendor
    Cisco
    Product
    Ncs 57b1-5dse-sys
    Vendor
    Cisco
    Product
    Ncs 57b1-6d24-sys
    Vendor
    Cisco
    Product
    Ncs 57c1-48q6-sys
    Vendor
    Cisco
    Product
    Ncs 57c3-mod-sys
    Vendor
    Cisco
    Product
    Ncs 57d2-18dd-sys

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High